Pci6602 Triggers DAQmx C# .NET

[koins]

Hello,

I want to trigger a CIChannels.CreateAngularEncoderChannel.

The trigger should start the measurement after an rising edge.

Which Type of trigger I have to use ?

Thanks

André

[laurentp · Accepted solution]

Hello André,

You need a "digital start" to be able to start the measurement after an rising edge. You will have as parameter the slope (rising/falling) and the source (PFI0 for instance)

To be sure of the syntax, I advice you to use the DAQmx Examples as patterns, that you can find under .../National Instruments\NI-DAQ\Examples\

To get the list of the available text-based examples installed on your PC with the DAQmx drivers, please click on this link.

 Cheers,

Laurent P.

National Instruments

[koins]

Thanks I got it !

There is an other problem: How can I set the transfermode of the counters to DMA mode ? Can i recognize the number of samples actually read (something like the GPCTR_Watch-function ? ) 

Greetings

André

[laurentp]

Hello André,

You can always programmatically define whether you want to use DMA or Interrupts. Hier is a link where you can find complete information:

Configuring the Data Transfer Mechanism (Interrupts or DMA) in DAQmx and Traditional DAQ

In Labview, you can get all kind of information through property nodes, for instance: Total Samples Per Channel Acquired property node (Using NI-DAQmx Property Nodes for Analog Input Channels)

This should be possible and quite similair in C, however I can't find any documentation about it.

I hope this help.

Laurent P.

NI Switzerland